【NPU】Fix reshape test & add grad test (#31776)

* fix

* fix

python/paddle/fluid/tests/unittests/npu/test_reshape2_op_npu.py

@@ -0,0 +1,77 @@
+#  Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import print_function
+
+import numpy as np
+import unittest
+import sys
+sys.path.append("..")
+from op_test import OpTest
+import paddle
+import paddle.fluid as fluid
+
+paddle.enable_static()
+SEED = 2021
+
+
+@unittest.skipIf(not paddle.is_compiled_with_npu(),
+                 "core is not compiled with NPU")
+class TestReshape2(OpTest):
+    def setUp(self):
+        self.set_npu()
+        self.op_type = "reshape2"
+        self.place = paddle.NPUPlace(0)
+
+        self.init_data()
+        self.inputs = {"X": np.random.random(self.ori_shape).astype("float32")}
+        self.attrs = {"shape": self.new_shape}
+        self.outputs = {
+            "Out": self.inputs["X"].reshape(self.infered_shape),
+            'XShape': np.random.random(self.ori_shape).astype("float32")
+        }
+
+    def set_npu(self):
+        self.__class__.use_npu = True
+
+    def init_data(self):
+        self.ori_shape = (2, 100)
+        self.new_shape = (20, 10)
+        self.infered_shape = (20, 10)
+
+    def test_check_output(self):
+        self.check_output_with_place(
+            self.place, check_dygraph=False, no_check_set=['XShape'])
+
+    def test_check_grad_normal(self):
+        self.check_grad_with_place(
+            self.place, ['X'], 'Out', check_dygraph=False)
+
+
+class TestReshape2_case2(TestReshape2):
+    def init_data(self):
+        self.ori_shape = (2, 100)
+        self.new_shape = (-1, 10)
+        self.infered_shape = (20, 10)
+
+
+class TestReshape2_case3(TestReshape2):
+    def init_data(self):
+        self.ori_shape = (100, 5, 6)
+        self.new_shape = (-1, 0, 3)
+        self.infered_shape = (200, 5, 3)
+
+
+if __name__ == '__main__':
+    unittest.main()